Announcement

Announcement Module
Collapse
No announcement yet.

Painting Brick

Page Title Module
Move Remove Collapse
X
Conversation Detail Module
Collapse
  • Filter
  • Time
  • Show
Clear All
new posts

  • Painting Brick

    I am preparing a rental house for sale for my mother. The house is red brick, but the front of the house has been painted (acrylic latex). I don't like painted brick, but in the interest of uniformity I plan to paint the entire exterior. Does brick require priming prior to the finish coat? If primer is required, should I use alkyd or latex primer?

  • #2
    Re: Painting Brick

    I googled this for you:

    I recommend using a pressure washer and about 1500 - 2000 psi. You don’t need a large unit or excessive pressure. The idea is to remove all the dust, dirt, spider webs, pollution and maybe some loose paint. To much pressure or holding the nozzle to close could damage the mortar.
    If you have any efflorescence deposits, powdery residue, spend extra time rinsing with the pressure washer. Many washers can inject mild soaps into the pressurized water stream. This is especially useful for stubborn efflorescence deposits or other types of surface contamination.
    Another method for removing difficult stains, especially oily stains, is to use a small amount of dissolved laundry detergent in water and a scrub brush. Producing a very clean surface is important when painting exterior brick. Any remaining residues could interfere with the primers ability to stick, compromising the entire paint job before it’s begun.


    Step #2 - Remove Loose Paint and Repair Mortar



    All loose paint must be removed and any repairs made prior to priming and painting brick. Any remaining loose paint could cause premature peeling. If you find any loose or peeling paint, use a hand scraper, stiff putty knife or wire brush to remove it. Areas of removed paint on the brick face can be sanded smooth for a better looking paint job. Use a circular sander or palm sander with 60 or 80 grit sandpaper.
    Damaged or missing mortar can be repaired with premixed acrylic mortar patch available in a small tub or cartridge just like caulking. Or, you can use powdered mortar and mix it yourself, but it will need to dry for a few days before priming. The premixed mortar patch can be primed and painted immediately after it is dry.


    Step #3 – Priming the Brick



    All exposed brick or mortar must be primed with an acrylic masonry or quick drying universal primer. Primers like Zinsser’s 123 Acrylic primer are great for painting exterior brick. It will dry quickly, 1-2 hours to top coat, allowing you to paint sooner.
    If your chosen primer is thick, add a splash of water to help with penetration. There is no need to prime the entire brick surface if the original paint is in good shape and is compatible with your finish paint.
    All oil base paints must be fully primed if you plan on using an acrylic or latex over it. The rule is simple, oil base paint over water base paint but never water over oil without priming.


    Step #4 - Caulking and Sealing



    Gaps, cracks and holes larger than hairline, or 1/16 of an inch, should be caulked. This will keep water from entering the brick or mortar and getting under the paint.
    Other areas that will need caulking are around windows, doors, and any wood trim to the brick. Generally, any gap that can let water in will need some kind of sealing. For extra large gaps use foam backer rod and polyurethane caulking. For all other gaps a good elastomeric caulking can be used.


    Step #5 – Painting Exterior Brick



    Brick can be a difficult surface to paint. Typically, I spray the paint and back brush the first coat to make sure all areas have a good coat. The second coat can be sprayed without back brushing.
    Brick can also be brushed and rolled. Use a thick roller cover, ¾ inch or thicker, depending on your brick.
    The types of paint I like most when painting exterior brick are Elastomeric coatings or 100% Acrylic house paint. Oil base paints can also be used.

    Comment

    Working...
    X